There are
2,547 mi
from Rockville, MD to Hesperia, CA
That's the driving distance. It would take 1 day 21 hours to go from Rockville, Maryland to Hesperia, California.
The flight distance (direct flight from Rockville, MD to Hesperia, CA) is 2,227.45 mi.
2,547 mi = 4,099.18 kms